Car-brake



(No Model.)

A. B. POOL & J. J. BEALS.

GAR BRAKE.

Patente Aug. 25,

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U ITED STATES PATE T OF ICE.

ANTHONY B. POOL AND. JOSEPH J. BEALS, OF BOSTON, MASSACHUSETTS.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 458,407, dated August 25, 1891.

Application filed January 13, 1891. Serial No. 377,600. (No model.)

To all whom it may concern: cured on the worm-shaft between the nuts, Be it known that we, ANTHONY B. POOL and is connected by a jack-chain r with a and JOSEPH J. BEALS, both of Boston, in the sprocket w on the inner end of a horizontal county of Suffolk, State of Massachusetts, shaft y, journaled on the car. The end of 55 have invented certain new and useful Imsaid shaft projects beyond the car end and provements in Car-Brakes, of which the folbears a beveled gear .2, which meshes with a lowing is a description sufficiently full, clear, like gear on the brake-rod 15. Ahalf-elliptic and exact to enable any person skilled in the spring 16 is secured centrally to each nut 19. art or science to which said invention apper- The free ends of said springs are provided 60 IO tains to make and use the same, reference bewith friction-rolls 17, bearing against the ing had to the accompanying drawings, formbeams f h, respectively, being held in contact ing part of this specification, in whichtherewith by the pull-springs k. A like ar- Figure 1 is a bottom plan View of a car prorangement of parts is disposed between the vided with our improved brake; Fig. 2, a verbeams b g. 65

I5 tical longitudinal section of the same, and In the use of our improvement when the Fig. 3 a transverse section taken on line 00x brake-rod at either end of the car is roin Fig. 1. tated the worm 1' is driven, spreading the- Like letters and figures of reference indinuts 19 and forcing their springs 16 against cate corresponding parts in the different figthe respective beams, as b g. The beam is 70 20 ures of the drawings. driven toward the wheels and its shoes into Our invention relates to a brake mechanism contact therewith. The beam 9 is simultanewhich is especially-adapted for use on street ously driven outward toward the end of the I cars; and it consists in certain novel features car. The rods 2', connecting it with the ophereinafter fully set forth and claimed, the posite brake-beamf, force its shoes into en- 75 object being to produce a simpler, cheaper, gagem'ent with the adjacent wheels B. By and more effective device of this character this arrangement the brakes are applied at than is now in ordinary use. the same time to all the wheels of the car The nature and operation of the improvefrom either end thereof, rendering the action ment will be readily understood by all conmuch quicker and more effective than when 80 versant with such matters from the following a single beam is moved, as in brakes of ordiexplanation. nary construction. The springs 16 serve to In thedrawings,Arepresentsthecar, which cushion the beams and relieve the body of is of the ordinary form and construction. the car from the jar resulting from the con- The wheels B are mounted in the usual mantact of the shoes with the wheels. By rotat- 85 3 5 ner, and swinging brake-beams h f, provided ing the rod 15 in the opposite direction the with shoes (I, are secured to the car-body. nuts are driven toward each other, permitting Swinging beams g hare secured, respectively, the springs 70 to draw the beams in like dinear the ear ends parallel with the beams hf. reetion and release the wheels. The beam 9 is connected with the ordinary Having thus explained our inventiomwhat o 40 beam f by rods a, passing loosely through the we claim isadjacent beam 7), and the beam his connected 1. In a car-brake, the combination of a supin like manner with the beam 11 by rods j. plemental brake-beam, a right and left worm Springs is, disposed around said rods, connect disposed between said beam and the main adjacent beams g b and f hand act c'ontractbrake-beam, nuts fitted to slide on the car- 5 ively to draw them toward each other. Two body and travel on said worm, springs sehangers m are secured to the ear-bottom becured to said nuts and engaging the respecttween the beams 77. and f, and two nuts 19 are ive beams, and means for rotating the worm fitted to slide horizontally on said hangers. from the car-body, substantially as described. These nuts work on opposite ends of adouble 2. In a car-brake, a supplemental beam on I00 worm 7', whereby they may be moved in 013- the car-body disposedadjacent to one brakeposite directions. A sprocket-Wheel t is sebeam and connected by rods with the brake beam at the opposite end of the car, in combination with a worm rotatable from said body and connecting mechanism actuated thereby for spreading the adjacent beams.

' 3. In a car-brake, a supplemental beam on the car body disposed adjacent to one brakebeam and connected by rods with the brakeheam at the opposite end of the car, in combination with a worm rotatable from said body, and connecting mechanism actuated thereby for spreading the adjacent beams, and springs for returning said beams when released by the worm, substantially as described.

4. In a car-brake, a supplemental brakebeam in a plane parallel with the main beam, in combination with a right and left hand worm rotatable from the car-body, nuts on said worm, semi-elliptic springs on said nuts ated by the brake-rod for actuating said worm, substantially as described.

6. The combination of the car-bodyprovided with supplemental brake-beams g h, respectively connected with opposite main brakebeams, pull-springs connecting said supplemental brake-beams with the adjacent main beams, two nuts fitted to slide on the car between each set of beams, worms for spreading said nuts rotatable from the car-body, and a semi-elliptic spring on each nut bearing against the adjacent beam, substantially as described.

7. The combination of the car-body provided withbeams g 71-, rods z'j, connecting said beams with opposite brake-beams, springs 1c, connecting said beams with adjacent brakebeams, nutsp, fitted to slide on said body, the worms 1' and actuating mechanism, and the springs 16, secured to said nuts and provided with friction-rolls bearing against said beams, substantially as described.

ANTHONY B. POOL. JOSEPH J. BEALS.

\Vitnesses:

O. M. SHAW, K. bURFE'E. 

